Merge tag 'dmaengine_topic_slave_id_removal_5.17' into next

Merge the tag dmaengine_topic_slave_id_removal_5.17 into next. This
brings in the slave_id removal topic changes

Author: vinodkoul

drivers/dma/mmp_pdma.c

@@ -727,12 +727,6 @@ static int mmp_pdma_config_write(struct dma_chan *dchan,
 
 	chan->dir = direction;
 	chan->dev_addr = addr;
-	/* FIXME: drivers should be ported over to use the filter
-	 * function. Once that's done, the following two lines can
-	 * be removed.
-	 */
-	if (cfg->slave_id)
-		chan->drcmr = cfg->slave_id;
 
 	return 0;
 }

drivers/dma/pxa_dma.c

@@ -909,13 +909,6 @@ static void pxad_get_config(struct pxad_chan *chan,
 		*dcmd |= PXA_DCMD_BURST16;
 	else if (maxburst == 32)
 		*dcmd |= PXA_DCMD_BURST32;
-
-	/* FIXME: drivers should be ported over to use the filter
-	 * function. Once that's done, the following two lines can
-	 * be removed.
-	 */
-	if (chan->cfg.slave_id)
-		chan->drcmr = chan->cfg.slave_id;
 }
 
 static struct dma_async_tx_descriptor *

drivers/dma/qcom/qcom_adm.c

@@ -8,6 +8,7 @@
 #include <linux/device.h>
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
+#include <linux/dma/qcom_adm.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -140,6 +141,8 @@ struct adm_chan {
 
 	struct adm_async_desc *curr_txd;
 	struct dma_slave_config slave;
+	u32 crci;
+	u32 mux;
 	struct list_head node;
 
 	int error;
@@ -379,8 +382,8 @@ static struct dma_async_tx_descriptor *adm_prep_slave_sg(struct dma_chan *chan,
 			return ERR_PTR(-EINVAL);
 		}
 
-		crci = achan->slave.slave_id & 0xf;
-		if (!crci || achan->slave.slave_id > 0x1f) {
+		crci = achan->crci & 0xf;
+		if (!crci || achan->crci > 0x1f) {
 			dev_err(adev->dev, "invalid crci value\n");
 			return ERR_PTR(-EINVAL);
 		}
@@ -403,9 +406,7 @@ static struct dma_async_tx_descriptor *adm_prep_slave_sg(struct dma_chan *chan,
 	if (!async_desc)
 		return ERR_PTR(-ENOMEM);
 
-	if (crci)
-		async_desc->mux = achan->slave.slave_id & ADM_CRCI_MUX_SEL ?
-					ADM_CRCI_CTL_MUX_SEL : 0;
+	async_desc->mux = achan->mux ? ADM_CRCI_CTL_MUX_SEL : 0;
 	async_desc->crci = crci;
 	async_desc->blk_size = blk_size;
 	async_desc->dma_len = single_count * sizeof(struct adm_desc_hw_single) +
@@ -488,10 +489,13 @@ static int adm_terminate_all(struct dma_chan *chan)
 static int adm_slave_config(struct dma_chan *chan, struct dma_slave_config *cfg)
 {
 	struct adm_chan *achan = to_adm_chan(chan);
+	struct qcom_adm_peripheral_config *config = cfg->peripheral_config;
 	unsigned long flag;
 
 	spin_lock_irqsave(&achan->vc.lock, flag);
 	memcpy(&achan->slave, cfg, sizeof(struct dma_slave_config));
+	if (cfg->peripheral_size == sizeof(config))
+		achan->crci = config->crci;
 	spin_unlock_irqrestore(&achan->vc.lock, flag);
 
 	return 0;
@@ -694,6 +698,45 @@ static void adm_channel_init(struct adm_device *adev, struct adm_chan *achan,
 	achan->vc.desc_free = adm_dma_free_desc;
 }
 
+/**
+ * adm_dma_xlate
+ * @dma_spec:	pointer to DMA specifier as found in the device tree
+ * @ofdma:	pointer to DMA controller data
+ *
+ * This can use either 1-cell or 2-cell formats, the first cell
+ * identifies the slave device, while the optional second cell
+ * contains the crci value.
+ *
+ * Returns pointer to appropriate dma channel on success or NULL on error.
+ */
+static struct dma_chan *adm_dma_xlate(struct of_phandle_args *dma_spec,
+			       struct of_dma *ofdma)
+{
+	struct dma_device *dev = ofdma->of_dma_data;
+	struct dma_chan *chan, *candidate = NULL;
+	struct adm_chan *achan;
+
+	if (!dev || dma_spec->args_count > 2)
+		return NULL;
+
+	list_for_each_entry(chan, &dev->channels, device_node)
+		if (chan->chan_id == dma_spec->args[0]) {
+			candidate = chan;
+			break;
+		}
+
+	if (!candidate)
+		return NULL;
+
+	achan = to_adm_chan(candidate);
+	if (dma_spec->args_count == 2)
+		achan->crci = dma_spec->args[1];
+	else
+		achan->crci = 0;
+
+	return dma_get_slave_channel(candidate);
+}
+
 static int adm_dma_probe(struct platform_device *pdev)
 {
 	struct adm_device *adev;
@@ -838,8 +881,7 @@ static int adm_dma_probe(struct platform_device *pdev)
 		goto err_disable_clks;
 	}
 
-	ret = of_dma_controller_register(pdev->dev.of_node,
-					 of_dma_xlate_by_chan_id,
+	ret = of_dma_controller_register(pdev->dev.of_node, adm_dma_xlate,
 					 &adev->common);
 	if (ret)
 		goto err_unregister_dma;

drivers/dma/sh/shdma-base.c

@@ -786,14 +786,6 @@ static int shdma_config(struct dma_chan *chan,
 	if (!config)
 		return -EINVAL;
 
-	/*
-	 * overriding the slave_id through dma_slave_config is deprecated,
-	 * but possibly some out-of-tree drivers still do it.
-	 */
-	if (WARN_ON_ONCE(config->slave_id &&
-			 config->slave_id != schan->real_slave_id))
-		schan->real_slave_id = config->slave_id;
-
 	/*
 	 * We could lock this, but you shouldn't be configuring the
 	 * channel, while using it...

drivers/dma/sprd-dma.c

@@ -795,9 +795,6 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
 		return dst_datawidth;
 	}
 
-	if (slave_cfg->slave_id)
-		schan->dev_id = slave_cfg->slave_id;
-
 	hw->cfg = SPRD_DMA_DONOT_WAIT_BDONE << SPRD_DMA_WAIT_BDONE_OFFSET;
 
 	/*

drivers/dma/tegra20-apb-dma.c

@@ -343,12 +343,6 @@ static int tegra_dma_slave_config(struct dma_chan *dc,
 	}
 
 	memcpy(&tdc->dma_sconfig, sconfig, sizeof(*sconfig));
-	if (tdc->slave_id == TEGRA_APBDMA_SLAVE_ID_INVALID &&
-	    sconfig->device_fc) {
-		if (sconfig->slave_id > TEGRA_APBDMA_CSR_REQ_SEL_MASK)
-			return -EINVAL;
-		tdc->slave_id = sconfig->slave_id;
-	}
 	tdc->config_init = true;
 
 	return 0;

drivers/dma/xilinx/xilinx_dpdma.c

@@ -12,6 +12,7 @@
 #include <linux/clk.h>
 #include <linux/debugfs.h>
 #include <linux/delay.h>
+#include <linux/dma/xilinx_dpdma.h>
 #include <linux/dmaengine.h>
 #include <linux/dmapool.h>
 #include <linux/interrupt.h>
@@ -1273,6 +1274,7 @@ static int xilinx_dpdma_config(struct dma_chan *dchan,
 			       struct dma_slave_config *config)
 {
 	struct xilinx_dpdma_chan *chan = to_xilinx_chan(dchan);
+	struct xilinx_dpdma_peripheral_config *pconfig;
 	unsigned long flags;
 
 	/*
@@ -1282,15 +1284,18 @@ static int xilinx_dpdma_config(struct dma_chan *dchan,
 	 * fixed both on the DPDMA side and on the DP controller side.
 	 */
 
-	spin_lock_irqsave(&chan->lock, flags);
-
 	/*
-	 * Abuse the slave_id to indicate that the channel is part of a video
-	 * group.
+	 * Use the peripheral_config to indicate that the channel is part
+	 * of a video group. This requires matching use of the custom
+	 * structure in each driver.
 	 */
-	if (chan->id <= ZYNQMP_DPDMA_VIDEO2)
-		chan->video_group = config->slave_id != 0;
+	pconfig = config->peripheral_config;
+	if (WARN_ON(pconfig && config->peripheral_size != sizeof(*pconfig)))
+		return -EINVAL;
 
+	spin_lock_irqsave(&chan->lock, flags);
+	if (chan->id <= ZYNQMP_DPDMA_VIDEO2 && pconfig)
+		chan->video_group = pconfig->video_group;
 	spin_unlock_irqrestore(&chan->lock, flags);
 
 	return 0;

drivers/gpu/drm/xlnx/zynqmp_disp.c

@@ -24,6 +24,7 @@
 
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/dma/xilinx_dpdma.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/module.h>
@@ -1058,14 +1059,18 @@ static void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
 	zynqmp_disp_avbuf_set_format(layer->disp, layer, layer->disp_fmt);
 
 	/*
-	 * Set slave_id for each DMA channel to indicate they're part of a
+	 * Set pconfig for each DMA channel to indicate they're part of a
 	 * video group.
 	 */
 	for (i = 0; i < info->num_planes; i++) {
 		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
+		struct xilinx_dpdma_peripheral_config pconfig = {
+			.video_group = true,
+		};
 		struct dma_slave_config config = {
 			.direction = DMA_MEM_TO_DEV,
-			.slave_id = 1,
+			.peripheral_config = &pconfig,
+			.peripheral_size = sizeof(pconfig),
 		};
 
 		dmaengine_slave_config(dma->chan, &config);

drivers/mmc/host/bcm2835.c

@@ -1293,14 +1293,12 @@ static int bcm2835_add_host(struct bcm2835_host *host)
 
 		host->dma_cfg_tx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 		host->dma_cfg_tx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-		host->dma_cfg_tx.slave_id = 13;		/* DREQ channel */
 		host->dma_cfg_tx.direction = DMA_MEM_TO_DEV;
 		host->dma_cfg_tx.src_addr = 0;
 		host->dma_cfg_tx.dst_addr = host->phys_addr + SDDATA;
 
 		host->dma_cfg_rx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 		host->dma_cfg_rx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-		host->dma_cfg_rx.slave_id = 13;		/* DREQ channel */
 		host->dma_cfg_rx.direction = DMA_DEV_TO_MEM;
 		host->dma_cfg_rx.src_addr = host->phys_addr + SDDATA;
 		host->dma_cfg_rx.dst_addr = 0;

drivers/mtd/nand/raw/qcom_nandc.c

@@ -6,6 +6,7 @@
 #include <linux/clk.h>
 #include <linux/slab.h>
 #include <linux/bitops.h>
+#include <linux/dma/qcom_adm.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/module.h>
@@ -952,6 +953,7 @@ static int prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
 	struct dma_async_tx_descriptor *dma_desc;
 	struct scatterlist *sgl;
 	struct dma_slave_config slave_conf;
+	struct qcom_adm_peripheral_config periph_conf = {};
 	enum dma_transfer_direction dir_eng;
 	int ret;
 
@@ -983,11 +985,19 @@ static int prep_adm_dma_desc(struct qcom_nand_controller *nandc, bool read,
 	if (read) {
 		slave_conf.src_maxburst = 16;
 		slave_conf.src_addr = nandc->base_dma + reg_off;
-		slave_conf.slave_id = nandc->data_crci;
+		if (nandc->data_crci) {
+			periph_conf.crci = nandc->data_crci;
+			slave_conf.peripheral_config = &periph_conf;
+			slave_conf.peripheral_size = sizeof(periph_conf);
+		}
 	} else {
 		slave_conf.dst_maxburst = 16;
 		slave_conf.dst_addr = nandc->base_dma + reg_off;
-		slave_conf.slave_id = nandc->cmd_crci;
+		if (nandc->cmd_crci) {
+			periph_conf.crci = nandc->cmd_crci;
+			slave_conf.peripheral_config = &periph_conf;
+			slave_conf.peripheral_size = sizeof(periph_conf);
+		}
 	}
 
 	ret = dmaengine_slave_config(nandc->chan, &slave_conf);